no such slot ERROR

I want to create location of time-out:

file TestYourReflex.hpp

#ifndef TestYourReflex_HPP_
#define TestYourReflex_HPP_

#include 
#include 
#include 

namespace bb { namespace cascades { class Application; }}

/*!
 * @brief Application pane object
 *
 *Use this object to create and init app UI, to create context objects, to register the new meta types etc.
 */
class TestYourReflex : public QObject
{
    Q_OBJECT
public:
    TestYourReflex(bb::cascades::Application *app);
    virtual ~TestYourReflex() {};
public slots:
    void Timeout(int a);

};

#endif /* TestYourReflex_HPP_ */

file TestYourReflex.cpp

// Default empty project template
#include "TestYourReflex.hpp"

#include 
#include 
#include 
#include 
#include 

using namespace bb::cascades;

TestYourReflex::TestYourReflex(bb::cascades::Application *app) :
        QObject(app) {
    // create scene document from main.qml asset
    // set parent to created document to ensure it exists for the whole application lifetime
    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);

    // create root object for the UI
    AbstractPane *root = qml->createRootObject();
    QTimer *timer = new QTimer(this);
    timer->setInterval(1000);
    timer->start();
    connect(timer, SIGNAL(timeout()), this, SLOT(Timeout(seed)));
    // set created root object as a scene
    app->setScene(root);
}

void TestYourReflex::Timeout(QTimer *timer){
    qDebug() << "timeout";
    timer->stop();

}

When the Timeout() function isn't param QTimer * timer this code works very well. but when I pass QTimer * timer settings as above. the code does not work and has had this ERROR

Object::connect NOTICE: No such didn't slot TestYourReflex::Timeout (seed) in... /SRC/TestYourReflex.cpp:23

can someone help me

You can not pass additional parameters to slots. Their signatures shall be the same as the signatures of signal.

It allowed to omit the parameters of the signal in niches, but change the any types or passage of additional data is not allowed.

In this case, a possible solution is says QTimer * in the file header as a member variable.

Declare other variables you need to access functions in the same way.

Don't forget to remove 'int a' params or it will not work in the slot:

class QTimer;

class TestYourReflex : public QObject
{
    Q_OBJECT
public:
    TestYourReflex(bb::cascades::Application *app);
    virtual ~TestYourReflex() {};
public slots:
    void onTimeout();

protected:
    QTimer *timer_;
};

In the .cpp:

   timer_ = new QTimer(this);
    timer_->setInterval(1000);
    timer_->start();        QObject::connect(timer_, SIGNAL(timeout()), this, SLOT(onTimeout()));

...

void TestYourReflex::onTimeout(){
    qDebug() << "timeout";
    timer_->stop();
}

P.s. There is also QTimer::singleShot (1000, this, SLOT (onTimeout (())) that fires the timer once only and requires no declaration of a variable.

P.s.s. A convention of Qt is to begin the names of variable and method with small letters. In capital letters are for guys, so they can be easily distinguished from the variables.

Tags: BlackBerry Developers

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